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Finding the Fourth Proportional to 65,315.95, 90,127.95 and 39,813.10

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Solution

The fourth proportional to 65,315.95, 90,127.95 and 39,813.10 is: 54,937.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,315.95 : 90,127.95 = 39,813.10 : x
  2. Step 2: Convert to fraction form
    65,315.95/90,127.95 = 39,813.10/x
  3. Step 3: Cross multiply
    65,315.95x = 90,127.95 × 39,813.10
  4. Step 4: Simplify right side
    65,315.95x = 3,588,273,086.15
  5. Step 5: Solve for x
    x = 3,588,273,086.15/65,315.95
  6. Step 6: Final answer
    x = 54,937.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.